The part I'm particularly concerned with is the "Face velocities of 250-600 FPM"... that tells me that it could go anywhere from 4.1 FPS to 10 FPS with a temp difference of over 40 degF... oddly, I can be assured of a temp difference (like I said) of up to 100 degF, and somedays even more, albeit for short periods of time. (Several hours a day, while the sun is between the hills I'll be building between.)
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